Improvement in insulators for telegraph-wires



M. DE MONTUFAR. INSULATOR FOR TELEGRAPH WIRES.

Patented Deo. 6, 1870.

MANUEL'DE MONTUFAR, OF NEW YORK. N. Y.

Letters Patent No. 109,879,,dated December 6, 1870.

IMPROVEMENT IN INSULATORS FOR TELEGRAPH-WIRES.

The Schedule referred to in these Letters Patent and making part of the same.

I, ll'lANUEL 1m MONTUFAR, of the city, county,

and State of New York, having invented a certain Insulator for the the Insulation of .Wires used as Conductors of Electricity iu-the Lines of Electriclclegraphs, give the following as av specification of it.

Object of the Intent-ion.

The object of my invention is-the perfection of the insulation of the wires employed as conductors of electricity in telegraphic lines, besides to protect the insulator itself against accident; of all kinds arising from natural or aititicial causes.

Description of the Drawing.

Figure A B is a front view of the insulator embodying the whole of the invention.

Figure No. 1 is the exterior cage of it when taken otf.

Figure No. 2 is the inner cage with the screwattached to it for'fixing it at the pole.

Figure No. 3 isthe undermost section of the cylinder. 1

Figure No. 4 is the uppermost section of the cylindcr.

General Description. The insulator or insulating body is to be made of hard gutta-pcrcha, of solid glass,. or of wood; its:

justed, is sufiicieut to hold the wire with the required tension, as firmly as it is convenient for the purpose.

I When the wood is to be used as the insulating body, and the wood is not naturally saturated with its own resin, then it is first heated and submerged intoa solution of shellac, or into melted pitch-pine resin, or into any other resin or substance non-com doctor of electricity, the operation being repeated as many times as it is necessary to saturate the wood completely with it, except in the case of making use of the unblecded pitch pine, which, being naturally and perfectly saturated with its own resin, ueedsfnot artificial process to render it as perfect an insuody as can be bad.

a insulating body is to be made of glass covered witli a coat of shellac or any s substance, in order to prevent the ac- "l itssurface of the aqueous vapors ittnosphere in damp or foggy weather,

3 is of itself a good insulator of elecknown that it easily becomes acondnctor as soon as the humidity condensing itself on its surface, forms there a thin tihn of water, by which the electricity passes into the ground.

When the insulator is to be made of gutta-percha, nothing is to be made but give to it the required shape, gutta-percha being one of the best non-conducting bodies; butin all cases, and in order to secure a good ,and pcrlcctiusulation of the wires used as conductors of electricity for telegraph purposes, it is absolutely necessary to varnish the two ends of the cage and twenty inches of the wire on both sides of the insulator, at the point of its exit from it with resin of any kind, to prevent tlicuebs, the nets of the spiders, and the nets of other insects, becoming badconncctions in rainy or wet weather bet-ween the iron cage of the insulator and the wire. I

The inner cage which it to contain the cylinderor insulating body, is to be made of galvanized iron and is fixed at the pole by the screw attached 'to it, which length and form is to be altered as thc,positiou of'the insulator in the line required it.

The outer cage is also made of galva iizcdiiron, and, when adjust-ed, contains the inner cage, the. iu= s'ulator and the conductor wire, it keeps the whole tightly closed together, neither permitting the'insulating body to get 011' of its place when shaken by strong winds, nor allowing the rain to pour into it, nor the snow or the dust to accumulate on its surface, keeping it so closely connected that even in case that the glass splits, as it happens sometimes undoubtedly by the action of electricity, it will continue to be as per-- fect an insulator as before,

By the peculiar arrangement and combination of all the parts composing the insulator, is attained not only the most perfect and secure insulation pos-' sible of the conducting wires f; but the insulating body too, is so effectively protected than neither malignit-y can break or injure it, nor natural accidents; nor the changes of weather, against which it is entirely protected, can exercise any influence on its physical properties as a non-comlucting body, so that as long as itremains in its place, italways acts as a true insulator, besides its mechanism is so arranged that its ditfcrent parts can be adjusted together with- MANUEL DE MONTUFAR. Witnesses:

EMILE POSTOLZ,

FRANCOIS STEPHANY. 

